Search results for: Graham M. Goldin

Items from 1 to 13 out of 13 results

article

An analysis of the structure of an n-dodecane spray flame using TPDF modelling

Yuanjiang Pei, Evatt R. Hawkes, Michele Bolla, Sanghoon Kook, more

Combustion and Flame > 2016 > 168 > C > 420-435

With a view to understanding ignition and combustion behaviours in diesel engines, this study investigates several aspects of ignition and combustion of an n-dodecane spray in a high pressure, high temperature chamber, known as Spray A, using data resulting from modelling using the transported probability density function (TPDF) method. The model has been validated comprehensively with good to excellent...

article

Modelling n-dodecane spray and combustion with the transported probability density function method

Yuanjiang Pei, Evatt R. Hawkes, Sanghoon Kook, Graham M. Goldin, more

Combustion and Flame > 2015 > 162 > 5 > 2006-2019

An n-dodecane spray in temperature and pressure conditions typical of diesel engines, known as Spray A, is modelled by the transported probability density function (TPDF) method coupled with a time-dependent Reynolds-averaged k–∊ turbulence model and a Lagrangian discrete phase model of the liquid spray. To establish a baseline for comparisons, non-reacting cases are first studied. Good results are...

article

Development of a gas phase combustion model suitable for low and high turbulence conditions

Ali Shiehnejadhesar, Ramin Mehrabian, Robert Scharler, Graham M. Goldin, more

Fuel > 2014 > 126 > Complete > 177-187

A novel hybrid gas phase combustion model suitable for low as well as high turbulent combustion conditions is proposed. In particular, in the region above the fuel bed of small-scale biomass combustion plants, gas phase mixing is highly influenced by laminar and low turbulence zones. Here, the eddy break-up combustion models are not valid because they were originally developed for highly turbulent...

article

The use of dynamic adaptive chemistry and tabulation in reactive flow simulations

Zhuyin Ren, Yufeng Liu, Tianfeng Lu, Liuyan Lu, more

Combustion and Flame > 2014 > 161 > 1 > 127-137

Detailed chemical kinetics is an integral component for predictive simulation of turbulent flames and is important for reliable prediction of flames and emissions. Major challenges of incorporation of detailed chemistry in flame simulations are induced by the large number of chemical species and the wide range of timescales involved in detailed kinetics. In this work, dynamic adaptive chemistry (DAC)...

article

Simulations of a turbulent non-premixed flame using combined dimension reduction and tabulation for combustion chemistry

Zhuyin Ren, Graham M. Goldin, Varun Hiremath, Stephen B. Pope

Fuel > 2013 > 105 > Complete > 636-644

The use of large chemical mechanisms of hydrocarbon fuels in turbulent flame simulations is computationally expensive due to the large number of chemical species and the wide range of chemical time scales involved. The reduced description of reactive flows in combination with chemistry tabulation can effectively reduce the simulation time when detailed chemical kinetics is employed in multi-dimensional...

article

Effects of three-dimensional cathode microstructure on the performance of lithium-ion battery cathodes

Andreas H. Wiedemann, Graham M. Goldin, Scott A. Barnett, Huayang Zhu, more

Electrochimica Acta > 2013 > 88 > Complete > 580-588

This paper develops a computational model that resolves the complex three-dimensional microstructure of Li-ion battery cathodes. The microstructural geometry is reconstructed from focused-ion-beam–scanning-electron-microscopy (FIB-SEM) experiments. Raw data from FIB-SEM experiments are processed into finite-volume discretizations that are directly suited for three-dimensional computational simulation...

article

Three-dimensional particle-resolved models of Li-ion batteries to assist the evaluation of empirical parameters in one-dimensional models

Graham M. Goldin, Andrew M. Colclasure, Andreas H. Wiedemann, Robert J. Kee

Electrochimica Acta > 2012 > 64 > Complete > 118-129

Li-ion batteries are frequently modeled using variants of the one-dimensional approach that was initially developed by Newman and colleagues (e.g., [2]). Necessarily such an approach is based upon assumptions about the electrode microstructure, and quantitative predictions depend upon empirical parameters such as effective conductivities and diffusion coefficients. The present paper develops a three-dimensional...

article

An efficient time scale model with tabulation of chemical equilibrium

Zhuyin Ren, Graham M. Goldin

Combustion and Flame > 2011 > 158 > 10 > 1977-1979

The laminar and turbulent characteristic time-scale combustion model is extended for general reactive flows. In this model, energy and species compositions relax toward their corresponding local chemical equilibrium state over a characteristic time. Chemical equilibrium is efficiently evaluated using in situ adaptive tabulation (ISAT). The model is applied to a steady-state simulation of Sandia Flame...

article

A particle-based model for predicting the effective conductivities of composite electrodes

Jay Sanyal, Graham M. Goldin, Huayang Zhu, Robert J. Kee

Journal of Power Sources > 2010 > 195 > 19 > 6671-6679

This paper develops particle-resolved simulations to predict conductivity within porous composite electrodes. Hundreds of spherical particles (order fractions of a micron) are packed randomly into a cubical region (order of a few microns), using two alternative packing algorithms. The composite structures include both ion-conducting and electron-conducting particles. The particle network is discretized...

article

Multidimensional flow, thermal, and chemical behavior in solid-oxide fuel cell button cells

Graham M. Goldin, Huayang Zhu, Robert J. Kee, David Bierschenk, more

Journal of Power Sources > 2009 > 187 > 1 > 123-135

The quantitative analysis and interpretation of button-cell experiments usually depends upon assuming isothermal conditions together with uniform and known gas composition within the gas compartments. An objective of the present effort is to develop computational tools to study the validity of such assumptions. A three-dimensional computational fluid dynamics (CFD) model is developed and applied to...

article

Transport budgets in turbulent lifted flames of methane autoigniting in a vitiated co-flow

Robert L. Gordon, Assaad R. Masri, Stephen B. Pope, Graham M. Goldin

Combustion and Flame > 2007 > 151 > 3 > 495-511

Autoignition of hydrocarbon fuels is an outstanding research problem of significant practical relevance in engines and gas turbine applications. This paper presents a numerical study of the autoignition of methane, the simplest in the hydrocarbon family. The model burner used here produces a simple, yet representative lifted jet flame issuing in a vitiated surrounding. The calculations employ a composition...

article

A priori investigation of the constructed PDF model

Graham M. Goldin

Proceedings of the Combustion Institute > 2005 > 30 > 1 > 785-792

The constructed probability density function (PDF) model approximates the species and temperature at a point in a general turbulent reacting flow by the species and temperature that evolved in an independent homogeneous turbulent flow. The thermo-chemical PDF is parameterized by a suitable set of lower moments, and tabulated for retrieval in 3D CFD codes. The Linear Eddy Model is used to resolve,...

article

A Comparison of Scalar PDF Turbulent Combustion Models

Graham M. Goldin, Suresh Menon

Combustion and Flame > 1998 > 113 > 3 > 442-453

Thermo-chemical scalar probability density functions (pdfs) measured in nonpremixed hydrogen and methane turbulent jet flames are compared a priori with an advanced conventional assumed shape pdf model, as well as a recently proposed constructed pdf model. The constructed pdf, by incorporating the underlying physics of advection by all unsteady eddies, molecular diffusion and chemical reaction, displays...

Filter options

Publication date

Set your own date range

Keywords

TABULATION (3)
DIESEL (2)
ENGINE COMBUSTION NETWORK (2)
LI-ION BATTERY (2)
N-DODECANE (2)
SOFC (2)
SPRAY A (2)
TRANSPORTED PROBABILITY DENSITY FUNCTION (2)
ADAPTIVE CHEMISTRY (1)
AUTOIGNITION (1)
BUTTON CELL (1)
CATHODE MICROSTRUCTURE (1)
CFD (1)
CHEMICAL EQUILIBRIUM (1)
CHEMICAL KINETICS (1)
COMBUSTION (1)
COMPOSITE ELECTRODE (1)
COMPUTATIONAL FLUID DYNAMICS (1)
CONSTRAINED EQUILIBRIUM (1)
CONSTRUCTED PDF (1)
DETAILED CHEMICAL KINETICS (1)
DETAILED MECHANISM (1)
DIFFERENTIAL DIFFUSION (1)
DIMENSION REDUCTION (1)
DIRECTED RELATION GRAPH (1)
EDDY DISSIPATION CONCEPT (1)
EFFECTIVE CONDUCTIVITY (1)
EFFECTIVE PROPERTIES (1)
ELECTRODE MICROSTRUCTURE (1)
FINITE RATE KINETICS (1)
FINITE-RATE CHEMISTRY (1)
HYBRID MODEL (1)
IGNITION (1)
LIFTED FLAMES (1)
MODELING (1)
NONPREMIXED FLAMES (1)
OPERATOR SPLITTING (1)
PERCOLATION THEORY (1)
THREE-DIMENSIONAL MODEL (1)
THREE-DIMENSIONAL MODELS (1)
TIME SCALE MODEL (1)
TURBULENT FLAMES (1)
TURBULENT TRANSPORT BUDGETS (1)
VITIATED CO-FLOW (1)
more

Journal

Combustion and Flame (6)
Electrochimica Acta (2)
Fuel (2)
Journal of Power Sources (2)
Proceedings of the Combustion Institute (1)

INFONA - science communication portal

Search results for: Graham M. Goldin

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options